Weather in Lisbon in June

How June compares

June is the 4th warmest month of the year in Lisbon and ranks 116th of 134 destinations we compare for June - see where else is hot in June. Within Portugal it is 10th of 13 (Portugal in June). Against London's average high of 19.6°C in June, Lisbon is 4.3°C warmer by day and 5.4°C warmer at night.

Daytime and night-time in June

The typical June day in Lisbon peaks at 23.9°C, but that is an average: the warmest 10% of days reach 28.9°C or more. Roughly 1 in 3 days top 25°C and 1 in 17 pass 30°C. Nights average 16.7°C; one night in ten drops to 14.6°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest June day here reached 39.0°C (2017-06-17) and the coldest night 11.8°C (2019-06-22).

Rain in June

Dry (3 rainy days or fewer): about 2 days with 1 mm or more, 11 mm in total. Year to year it varies a lot - the wettest June was 1997 with 46 mm, the driest 1999 with 1 mm. Humidity averages 71%.

Sea temperature in June

The sea averages 18.0°C - bracing (18-22°c). Depending on the year it ranges from 16.8°C to 19.4°C. For the warmest sea here, come in August (19.2°C).

Sunshine and daylight

Around 9.7 hours of sunshine a day (estimated from cloud cover), 14.7 hours of daylight: the sun rises about 06:11 and sets about 21:03 local time in mid-June. Average cloud cover is 34%.

Is June a good time to visit Lisbon?

Yes - it is one of the better months: warm days, little rain and long sunny days. The best months for Lisbon on our scoring are July, August, September; months averaging 25°C or more: Jul, Aug.

Warm days, with room for hotter spells

Lisbon's typical June warmth is comfortable for spending much of the day outdoors, but the average does not tell the whole story. Around 33% of days reach 25°C, while 6% reach 30°C, so allow for an occasional hotter afternoon rather than expecting the same conditions throughout your stay. Put more active plans earlier in the day if heat bothers you, and keep midday flexible. Light, breathable clothing is the sensible starting point. Evenings are cooler, and the coldest 10% of nights fall to 14.6°C or below, making a jumper useful if you plan to sit outside.

Mostly dry, with plenty of time outdoors

Rain is unlikely to dominate a June trip: the month averages about 2 rainy days. That makes outdoor plans a reasonable default, though it is still sensible to have something indoors in mind if a shower arrives. Sunshine averages 9.7 hours a day, giving you plenty of bright weather without implying that every day will be cloudless. Pack sunglasses, sunscreen and a hat, and take breaks from direct sun rather than judging its strength by the air temperature alone. A light rain layer is a useful backup, but wet-weather clothing need not take up much of your luggage.

Better for city time than warm-water swimming

The sea is the main reason to temper expectations of a summer swimming holiday. June water averages 18°C, with a year-to-year range of 17°C to 19°C, so warm air does not translate into warm swims. If you enjoy cool water, a dip may be part of the trip; if you prefer to linger comfortably, it is less convincing. Choose June primarily for warm days and low rainfall, with swimming treated as an optional extra. For travellers who dislike strong heat but still want plenty of time outside, that balance is more appealing than the sea temperature might first suggest.